I was cheated out of a promos because splash lp doesnt put you in promos

Literally just got cheated out of plat 1 mid because of this bs, now I have to waste even more of my time in games that don't give me lp, why does this game have to be so fucking frustrating.

Seriously, whats the point of having to win a game at 100 lp to put you into promos? Just to have my ahri stats fked over because my team decided to int. This game is beyond fking frustrating for all the wrong reasons.